What is the highest compression I can run on 92 octane pump gas? Want to run 11:1, but think it's too high. Maybe Mike could help me.

 

11:1 will work on pump gas with the correct timing adj. I run 92 octane w/ 11:1 no problems at all.

 

Tuning is everything.... I know a lot of people that run 12.5 on 92 with no detonation...

 

interesting, 12.5 on 92 maybe i might get 11.5 then...

anyways, since this is a "Compression" topic, i was wondering if anyone knew the compression ratio of a B20B with B16A2 head??? (stock internals)

oh *****, i just remembered i only get 91 around here, maybe 11:1 is good....

 

Don't worry ... 91oct + 11.5cr will do you just fine daily driver. I'm personally running 11.5 and use 91 octane.

 

KATMAN, are you the same "Katman" from "JDMHondaParts.com"???
..and thx for tha info...

 

Yep that's him, to Katman

 

have a play here:

http://www.c-speedracing.com/howto/c.../compcalc.html

t..

PS tuning tuning tuning...

 

CooL ThankS!!!

 

Crappy 9.3:1 compression ratio!!

 

If you got 9.3:1 just boost on it a bit, hehehe... Have fun Latez

 

I know of an ITR motor with a block guard, otherwise stock, running 6 lbs of boost on 93 with no detonation. Good tuner.

 

13:1 is the highest I would go with correct time adjustment and bigger injectors

Shane

 

It depends on the acceleration speed of your motor
A slow reving motor can't have alot of compression and will ping even with 9.1 compression
A fast accelerating motor can go to 11.1-12.5 compression with good tuning and never ping

Ever drive a towing vehicle and when pulling a trailer she pings and when you're not pulling anything it doesn't

Acceleration is controled by gearing


[Modified by tk, 7:54 AM 11/9/2002]

 

you can run 12:1 no prob around here josh

 

you can run that much on pump gas just make sure your timing is suffiecient. and fuel pressure. start at 14 degreees

 

yesh, yesh I am.

 

My friend had a B16B in his 99 EK..... For the NHRA event in August he swapped it out for a stock ITR motor just to boost it... He just had it chilling in his garage forever so i guess he figured why not... He said he didn't care if it blew up... I dunno why i would. (rich people) The night before he hooked a RevHard Stage 2C turbo with a T3/T04E hybrid boosting 12psi... Ran some 440's on it with Hondata2 just for that day and he ran a 12.50@112.... Nothing special but not bad for a internally stock motor without any real tuning... With his previous CTR motor the best for the car was only a 13.3@104... Peace

 

i run 13:1 on pump gas but the car is tuned with a fine tooth comb if you get what im saying. Spend some time trial amd error.

 

if the Toyota Celica GT-S comes with stock 11.5:1 compression then one would think 11:1 would be fine on a honda.

 

Thanks Mike.

 

Guy i talked to at JDMHONDAPARTS said he runs CTR pistons in his ITR motor with a 2 ply head gasket... 12.45 compression i think...on 91 octane...not sure how he tuned it. but he said its runnin strong. I was skeptical about factory pistons...but ive heard tooo many ppl say they were safe.

 

factory Honda pistons are safe, especially Type-R pistons, if you can't afford aftermarket pistons.

 

I am thinking of going 12:1 compression. Do I need to upgrade my rods or are the stock B series rods strong enough to handle it?

 

What motor?? nonVTEC or VTEC... Really it's a good thing to upgrade non VTEC rods but I know of many people around here that use stock rods with ARP rod bolts... It's a good idea to also get them shot peened as well.... My friend's CRVTEC running 84.5mm 12.0:1 JE slugs and stock rods holds up just fine... I know all together too many of you have heard me say this but his CRVTEC in his full interior EK ran a 12.62@107.... He also only revs it to 8400... it's got a Portflow head, CTR intake cam, RC 310's, ITR ECU and VAFC (also has never been on the dyno).... As long as you are staying NA you should be fine... GSR and ITR rods are stronger than nonVTEC's so I see no reason why they wouldn't hold up.... Good Luck